Subscribe | UPI Odd Newsletter Subscribe LIPUVALJAK, Estonia, Feb. 20 (UPI) -- Footage from a skiing event in Estonia shows a chain-reaction starting with a few skiers crashing and ending with dozens of participants taking a fall. The video, taken at the bottom of a downhill slope at the Tartu Maraton cross-country skiing event Saturday in Lipuvaljak, shows the skiing contest turn into a pileup with dozens of participants tripping over one another. Advertisement Aivo Jurken, who shot the video, said the "many, many falls and crashes" took place over half a mile into the race. Read More Skijoring event combines skiing with horse racing Helmet cam captures snowboarder's avalanche encounter Detroit-area road skier caught on live news camera